Display device including a sensor reducing influence of parasitic capacitance upon the sensor, and method of driving a display device
First Claim
1. A display device provided with a touch sensor, comprising:
- a plurality of common electrodes;
a plurality of pixel thin film transistors (pixel TFTs) arranged in a matrix in a display areaa plurality of pixel electrodes arranged in the matrix;
a plurality of gate lines connected to gate electrodes of the pixel TFTs and arranged in a row direction; and
a plurality of source lines connected to source electrodes of the pixel TFTs and arranged in a column direction,whereineach of the plurality of pixel electrodes is connected to a corresponding one of drain electrodes of the plurality of pixel TFTs,the plurality of common electrodes for display are also used for the touch sensor,an image display operation of the plurality of common electrodes for display and a driving operation of the plurality of common electrodes for the touch sensor are performed in a time sharing manner,all of the plurality of gate lines, which are connected to the gate electrodes of the pixel TFTs, are caused to be in a floating state in the driving operation of the common electrodes for the touch sensor,all of the plurality of source lines, which are connected to the source electrodes of the pixel TFTs, are caused to be in a floating state in the driving operation of the common electrodes for the touch sensor, andthe plurality of common electrodes are not connected to the plurality of gate lines and the plurality of source lines.
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Accused Products
Abstract
A display device provided with a touch sensor, includes a plurality of common electrodes, a plurality of display elements arranged in a matrix, a plurality of gate lines electrically connected to the display elements and arranged in a row direction, and a plurality of source lines electrically connected to the display elements and arranged in a column direction. The plurality of common electrodes for display are also used for the touch sensor. An image display operation of the plurality of common electrodes for display and a driving operation of the plurality of common electrodes for the touch sensor are performed in a time sharing manner, and all of the gate lines and the source lines are caused to be in a floating state in the driving operation of the common electrodes for the touch sensor.
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Citations
10 Claims
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1. A display device provided with a touch sensor, comprising:
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a plurality of common electrodes; a plurality of pixel thin film transistors (pixel TFTs) arranged in a matrix in a display area a plurality of pixel electrodes arranged in the matrix; a plurality of gate lines connected to gate electrodes of the pixel TFTs and arranged in a row direction; and a plurality of source lines connected to source electrodes of the pixel TFTs and arranged in a column direction, wherein each of the plurality of pixel electrodes is connected to a corresponding one of drain electrodes of the plurality of pixel TFTs, the plurality of common electrodes for display are also used for the touch sensor, an image display operation of the plurality of common electrodes for display and a driving operation of the plurality of common electrodes for the touch sensor are performed in a time sharing manner, all of the plurality of gate lines, which are connected to the gate electrodes of the pixel TFTs, are caused to be in a floating state in the driving operation of the common electrodes for the touch sensor, all of the plurality of source lines, which are connected to the source electrodes of the pixel TFTs, are caused to be in a floating state in the driving operation of the common electrodes for the touch sensor, and the plurality of common electrodes are not connected to the plurality of gate lines and the plurality of source lines. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A display device provided with a touch sensor, comprising:
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a plurality of common electrodes including a first common electrode; a plurality of pixel electrodes opposed to the first common electrode; a metal layer electrically connected to the first common electrode; a pixel thin film transistor (pixel TFT) including a gate electrode, a source electrode, and a drain electrode; a plurality of gate lines including a first gate line; a plurality of source lines including a first source line; a gate driver in a peripheral area; a source driver in the peripheral area; and a plurality of switches in the peripheral area including a first switch and a second switch, wherein the first gate line is connected to the gate electrode of the pixel TFT, the first source line is connected to the source electrode of the pixel TFT, the first pixel electrode is connected to the drain electrode of the pixel TFT, the first common electrode for display is also used for the touch sensor, an image display operation of the first common electrode for display and a driving operation of the first common electrode for the touch sensor are performed in a time sharing manner, the first switch connects and disconnects the first source line and the source driver, the second switch connects and disconnects the first gate line and the gate driver, the first switch and the second switch are opened in the driving operation of the first common electrode for the touch sensor, and the common electrodes are not connected to the first gate line and the first signal line in the driving operation of the first common electrode for the touch sensor. - View Dependent Claims (8, 9, 10)
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Specification